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Before posting, please read https://www.cgsecurity.org/testdisk.pdf

Drive was initialized using the controllers firmware, the disk was then
prepared for use under GParted Partition Editor where partition is
created and formatted as 1 JFS drive, total size is approaching 6tb, 4x
2 tb seagate drives

I'm running Fedora Linux F14 x64.

I was trying to install Fedora 17 and got 90 % complete
when the lights went out. Not sure if it was the power failure or a
mistake in selecting what drives to use for the install.

But after getting the machine back up and running the device /dev/sdc
has no partitions defined.

In Testdisk, I tried using intel format but it didn't work so I switched
to efi gpt and found the areca3 partition. I selected that one and did a
write and reboot but I can't mount the partition and fsck also fails.

can you offer a few pointers on how I might be able to recover the
partition?

I used fdisk to set the partition id to 83, same as the other partitions on the controller.
So basically I back to an uninitialized partition.
I've rerunning a quick scan that should complete in 18 hrs. or so.

I'm not as much a linux tech savvy
Your TestDisk message is only that some partitions are not recoverable because they end after disk limit.
I have no infos from the result.
Did TestDisk find your partition.
If your partition is already found and written into your partition table, you can have a try to repair your superblock.http://www-01.ibm.com/support/docview.w ... g3T1000156
If you have problems repairing your superblock, please let me know.

when I first started using testdisk, It indicated the intel pc partition format.
When I realized I should have selected gpt I stopped testdisk scan and restarted under gpt.
This was under the assumption that intel-pc format only supported up to a 2 tb partition size

Using gparted, I see /dev/sdc1 as a JFS partition with the correct label

but I can't mount the partition[root@mythtv todd]# mount /dev/sdc1 /mnt/areca3 -t jfs
mount: wrong fs type, bad option, bad superblock on /dev/sdc1,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so

fsck doesn't work either

[root@mythtv todd]# fsck.jfs /dev/sdc1
fsck.jfs version 1.1.13, 17-Jul-2008
processing started: 7/12/2012 6.50.36
Using default parameter: -p
The current device is: /dev/sdc1
Superblock is corrupt and cannot be repaired
since both primary and secondary copies are corrupt.